By 1600, the European voyages to the southern hemisphere and the use of telescopes revealed to astronomers and cartographers many new stars both in northern and in southern sky. These facts suggested to the astronomers the introduction of new constellations.
The two celestial planisheres bound in Coronelli's Epitome Cosmografica, published in Venice in 1693, are an interesting example of this tendency. In these maps we find some constellations that were defined in the XVII century and then fell into disuse. So we may see in this map the Jordanus, that flows to south of Ursa Major.

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Giordano in Coronelli's book (Bibl. del Dip. di Astronomia di Bologna)

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A cd-rom for a deeper view

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Author of these pages: Davide Neri - E-mail: ban2280@iperbole.bologna.it